Carol H Chang

US Patent:

6531322, Mar 11, 2003

Filed:

Nov 27, 2000

Appl. No.:

09/724142

Inventors:

Franklin A. Jurik - Pleasanton CA
Andrea Stubbs - Palo Alto CA
Mimi Diemmy Dao - San Jose CA
Carol Chang - San Francisco CA

Assignee:

Lifescan, Inc. - Milpitas CA

International Classification:

G01N 3300

US Classification:

436 95, 422 58, 422 56, 436170, 436 85

Abstract:

A visual blood glucose test strip has two membranes that each incorporate a reagent that reacts with glucose in a blood sample applied to the membranes to cause a color change. One of the membranes also includes an inhibitor and a dye. A blood sample applied to the strip causes the two membranes to form two different colors. Comparing the colors to a calibrated color chart permits a user to determine the glucose concentration in the blood sample.

US Patent:

6572822, Jun 3, 2003

Filed:

Aug 1, 2002

Appl. No.:

10/210119

Inventors:

Franklin A. Jurik - Pleasanton CA
Andrea Stubbs - Palo Alto CA
Mimi Diemmy Dao - San Jose CA
Carol Chang - San Francisco CA

Assignee:

Lifescan, Inc. - Milpitas CA

International Classification:

G01N 3122

US Classification:

422 56, 422 58, 422 61, 436170, 436 95

Abstract:

A visual blood glucose test strip has two membranes that each incorporate a reagent that reacts with glucose in a blood sample applied to the membranes to cause a color change. One of the membranes also includes an inhibitor and a dye. A blood sample applied to the strip causes the two membranes to form two different colors. Comparing the colors to a calibrated color chart permits a user to determine the glucose concentration in the blood sample.

US Patent:

D477670, Jul 22, 2003

Filed:

Jun 17, 2002

Appl. No.:

29/162558

Inventors:

Franklin A. Jurik - Pleasanton CA
Mimi Diemmy Dao - San Jose CA
Carol F. Chang - San Francisco CA
Lisa L. McLeod - Los Gatos CA

Assignee:

Lifescan, Inc. - Milpitas CA

International Classification:

2402

US Classification:

D24225

US Patent:

20030235923, Dec 25, 2003

Filed:

Jun 21, 2002

Appl. No.:

10/177820

Inventors:

Franklin Jurik - Pleasanton CA, US
Manoj Sharma - Milpitas CA, US
Carol Chang - San Francisco CA, US
Vinh Hoang - San Jose CA, US

International Classification:

G01N021/77

US Classification:

436/169000, 436/164000, 422/055000, 422/056000, 435/014000

Abstract:

A method for the acceptance testing of a set of multiple colored workpieces (e.g., paired color pads of a calibrated color chart or paired membranes of visual blood glucose test strip). The method includes first measuring a plurality of color parameters (e.g., L*a*b* color parameters) associated with the set of multiple colored workpieces, followed by conversion of the plurality of color parameters into a single response parameter. Next, the single response parameter for the set is compared to a predetermined single response parameter specification for the set and acceptance of the set of multiple colored workpieces determined based on the comparison. The method can be easily employed in conjunction with multiple (e.g., paired) membrane test strips used to measure, for example, glucose, cholesterol, proteins, ketones, phenylalanine or enzymes in blood, urine, saliva or other biological fluid and/or sample fluid characteristics such as pH and alkalinity.

US Patent:

61623970, Dec 19, 2000

Filed:

Aug 13, 1998

Appl. No.:

9/133857

Inventors:

Franklin A. Jurik - Pleasanton CA
Andrea Stubbs - Palo Alto CA
Mimi Diemmy Dao - San Jose CA
Carol Chang - San Francisco CA

Assignee:

Lifescan, Inc. - Milpitas CA

International Classification:

G01N 3122
G01N 3352
G01N 3366

US Classification:

422 56

Abstract:

A visual blood glucose test strip has two membranes that each incorporate a reagent that reacts with glucose in a blood sample applied to the membranes to cause a color change. One of the membranes also includes an inhibitor and a dye. A blood sample applied to the strip causes the two membranes to form two different colors. Comparing the colors to a calibrated color chart permits a user to determine the glucose concentration in the blood sample.